postgresql91-devel no include [pg_config] ??

Hi.

I run this:

[root@282968 home]# yum install postgresql91-devel
...etc.
...etc
...etc
Dependencies Resolved


=============================================================================================================================================================
 Package                                     Arch
    Version                                     Repository
          Size

=============================================================================================================================================================
Installing:
 postgresql91-devel                          i386
    9.1.3-1PGDG.rhel5                           pgdg91
         1.6 M

Transaction Summary

=============================================================================================================================================================
Install       1 Package(s)
Upgrade       0 Package(s)

Total download size: 1.6 M
Is this ok [y/N]: y
Downloading Packages:
postgresql91-devel-9.1.3-1PGDG.rhel5.i386.rpm
                                                               | 1.6
MB     00:00
Running rpm_check_debug
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing     : postgresql91-devel

           1/1

Installed:
  postgresql91-devel.i386 0:9.1.3-1PGDG.rhel5

Complete!
[root@282968 home]# whereis pg_config
pg_config:
[root@282968 home]#

Why PgSQL 9.1 no have {pg_config} ??

What I need do to have my {pg_config} ??

I go to:
http://archives.postgresql.org/pgsql-novice/2006-10/msg00056.php
And I read solution = yum install postgresql91-devel

Please help.

Thanks